On a system of functional equations occurring in the theory of geometric objects Z. Kareńska — 1980 Annales Polonici Mathematici
Über ein geometrisches lineares Objeckt des Typus [3, 2, 1] Z. Kareńska — 1968 Annales Polonici Mathematici
On some two functional equations in the theory of geometric objects Z. Kareńska — 1978 Commentationes Mathematicae The article contains no abstract